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Mr. Striggow <br />Page 3 <br />May 13, 2015 <br />12. The Mining Plan Map depicts the Windsor Canal on the east side of the amended area. <br />However, previously submitted maps identify this canal as the Poudre Valley Canal. Please <br />clarify the name of the canal on the east side of the amended area. <br />6.4.4 Exhibit D — Mining Plan <br />13. The Mining Plan does not specify the dip or strike of the sandstone beds. Please provide one <br />or more cross-sections of the amended area showing the strike and dip of the sandstone beds. <br />In addition, clarify if the quarry floor will follow the dip of the sandstone beds or if the <br />quarry floor will be horizontal or near horizontal. <br />14. Please specify if the quarry walls will be mined vertically. If the quarry walls will be mined <br />at an angle other than vertical, then specify the angle at which they will be mined. <br />15. The Operator has stated that stormwater captured in the quarry will infiltrate into the ground <br />within 10 days of a storm event. Any stormwater runoff intercepted by this operation that is <br />not diverted or captured in priority must infiltrate into the ground or be released to the stream <br />system within 72 hours. Otherwise, the operator is required to make replacements for <br />evaporation pursuant to an approved substitute water supply plan or decreed plan for <br />augmentation. During the Division's inspection conducted on April 23, 2015, stormwater <br />was observed in the quarry area immediately north of the amendment area. Please describe <br />how the stormwater will be managed at the mine site. The stormwater management plan shall <br />include provisions for either diverting stormwater from the active quarry areas or for <br />pumping water from the quarry. <br />16. The Operator is proposing to construct an earthen berm at the south end of the amendment <br />area. The Mining Plan does not specify if the berm will be constructed from topsoil or <br />overburden. Pursuant to Rule 3.1.9(3), topsoil stockpiles shall be stored in places and <br />configurations to minimize erosion. Topsoil should not be used to construct the proposed <br />berm since the structure will be located within a natural drainage channel. Please respond. <br />17. There are several permanent man-made structures on the 4.4 acre parcel including a small <br />house and a loafing shed and an above ground electric and telephone line. Presumably these <br />structures will be removed from the property prior to the commencement of mining. Please <br />provide documentation which demonstrates that the owner of the property has authorized the <br />Operator to remove the structures in order to accommodate the mining operation. <br />18. The existing access road follows the eastern boundary of the amended area. The road is <br />elevated above the amended area and the western edge of the road has a steep dip toward the <br />proposed quarry. The access road is situated on the west side of the Poudre Valley Canal, an <br />unlined canal that carries water periodically throughout the year. The proximity of these <br />structures to the quarry area, combined with saturated sub -grade materials from seepage of <br />the canal, places these structures at risk of possible slope failure. <br />